Americans win Ryder Cup in a rout, send Europe a message

Team USA players hold up a "W" for Wisconsin after the Ryder Cup matches at the Whistling Straits Golf Course Sunday, Sept. 26, 2021, in Sheboygan, Wis. (AP Photo/Ashley Landis) Team USA players hold up a "W" for Wisconsin after the Ryder Cup matches at the Whistling Straits Golf Course Sunday, Sept. 26, 2021, in Sheboygan, Wis. (AP Photo/Ashley Landis)

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Why COVID-19 boosters weren't tweaked to better match variants

More COVID-19 booster shots may be on the way -- but when it's your turn, you'll get an extra dose of the original vaccine, not one updated to better match the extra-contagious delta variant. And that has some experts wondering if the booster campaign is a bit of a missed opportunity to target delta and its likely descendants.

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